linux-kernel - Re: [PATCH v3 07/12] phy: Add usb phy support for hi3660 Soc of Hisilicon

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Date:   Sat, 2 Mar 2019 17:56:17 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Yu Chen <chenyu56@...wei.com>
Cc:     USB <linux-usb@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        John Stultz <john.stultz@...aro.org>,
        Suzhuangluan <suzhuangluan@...ilicon.com>,
        Kongfei <kongfei@...ilicon.com>, liuyu712@...ilicon.com,
        wanghu17@...ilicon.com, butao@...ilicon.com,
        Yao Chen <chenyao11@...wei.com>, fangshengzhou@...ilicon.com,
        lipengcheng8@...wei.com, songxiaowei <songxiaowei@...ilicon.com>,
        xu yiping <xuyiping@...ilicon.com>, xuyoujun4@...wei.com,
        yudongbin@...ilicon.com, zangleigang@...ilicon.com,
        Kishon Vijay Abraham I <kishon@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>, Shawn Guo <shawnguo@...nel.org>,
        Pengcheng Li <lpc.li@...ilicon.com>,
        Jianguo Sun <sunjianguo1@...wei.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Jiancheng Xue <xuejiancheng@...ilicon.com>,
        Binghui Wang <wangbinghui@...ilicon.com>
Subject: Re: [PATCH v3 07/12] phy: Add usb phy support for hi3660 Soc of Hisilicon

On Sat, Mar 2, 2019 at 11:06 AM Yu Chen <chenyu56@...wei.com> wrote:
>
> This driver handles usb phy power on and shutdown for hi3660 Soc of
> Hisilicon.

Few comments below. After fixing them, FWIW
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

> +#define HI3660_USB_DEFAULT_PHY_PARAM           0x1c466e3

A bit of description would be nice to have what this value means.

> +       /* delay for exit from IDDQ mode */
> +       usleep_range(100, 100);

100,100 ? I think you need to give a room to scheduler, at least 20%
margin would be good to have.

> +       /* delay for vbus valid */
> +       usleep_range(100, 100);

Ditto.


-- 
With Best Regards,
Andy Shevchenko